gusucode.com > DSISoft是由加拿大地质调查局发布的用于垂直地震剖面(VSP)数据处理的免费软件包 > dsisoftv3/main/txptdiff.m
function [t]=txptdiff(s,r,p,v) % txptdiff: function to calculate the traveltime in a medium with constant % velocity v, from a point diffractor: % INPUT: % s=[sx;sy;sz] source position % r=[rx;ry;rz] receiver position % p=[x;y;z] position of a POINT DIFFRACTOR % OUTPUT: travel time. %DSI customized VSP processing software %by I. Kay (April 1999) %$Id: txptdiff.m,v 3.0 2000/06/13 19:22:33 gilles Exp $ %$Log: txptdiff.m,v $ %Revision 3.0 2000/06/13 19:22:33 gilles %Release 3 % %Revision 2.0 1999/05/21 18:46:59 mah %Release 2 % %Revision 1.1 1999/04/15 16:42:18 kay %Initial revision % %Copyright (C) 1998 Seismology and Electromagnetic Section/ %Continental Geosciences Division/Geological Survey of Canada % %This library is free software; you can redistribute it and/or %modify it under the terms of the GNU Library General Public %License as published by the Free Software Foundation; either %version 2 of the License, or (at your option) any later version. % %This library is distributed in the hope that it will be useful, %but WITHOUT ANY WARRANTY; without even the implied warranty of %MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU %Library General Public License for more details. % %You should have received a copy of the GNU Library General Public %License along with this library; if not, write to the %Free Software Foundation, Inc., 59 Temple Place - Suite 330, %Boston, MA 02111-1307, USA. % %DSI Consortium %Continental Geosciences Division %Geological Survey of Canada %615 Booth St. %Ottawa, Ontario %K1A 0E9 % %email: dsi@cg.nrcan.gc.ca l=( sqrt(dot((p-s),(p-s)) ) + sqrt( dot((r-p),(r-p)) ) ); t=sqrt(1/v/v*l*l);